64280965 has 16 divisors (see below), whose sum is σ = 91198080. Its totient is φ = 42557760.

The previous prime is 64280963. The next prime is 64280969. The reversal of 64280965 is 56908246.

It is a happy number.

It is not a de Polignac number, because 64280965 - 2¹ = 64280963 is a prime.

It is a super-2 number, since 2×64280965² = 8264084922662450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64280963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30651 + ... + 32680.

It is an arithmetic number, because the mean of its divisors is an integer number (5699880).

Almost surely, 2^64280965 is an apocalyptic number.

It is an amenable number.

64280965 is a deficient number, since it is larger than the sum of its proper divisors (26917115).

64280965 is a wasteful number, since it uses less digits than its factorization.

64280965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63372.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 64280965 is about 8017.5410819029. The cubic root of 64280965 is about 400.5844892648.

The spelling of 64280965 in words is "sixty-four million, two hundred eighty thousand, nine hundred sixty-five".